Fluid pulsating device.



A. BALL.

FLUID PULSATING DEVICE.

APPLICATION FILED NOV; 4, 1909.

1,179,994. Patented Apr. 18,1916.

witnes see Inventor -%UZZ% %%a12 A Zbert Ball pm 09% y Fflwd tlttgs.

THE COLUMBIA PLAlyoGRAPH co., WASHINGTON, b. c.-

- pnrrnn snares PAENT enrich.

, ALBERT BALL, OF CLAREMONT, NEW HAMPSHIRE. ASSIGNOR, BY IVIESNE ASSIGN-MENTS, TO SULLIVAN lVIACHINERY COMPANY, OF BOSTON, MASSACHUSETTS, A

CORPORATION OF MASSACHUSETTE.

FLUID PULsnrINe DEVICE.

Specification of Letters Patent.

Original application filed February 2, l907,Seria1No.355,404. Dividedand this application filed November 4, 1909. Serial No. 526,251.

TooZZ whom it may] concern Be it known that I, ALBERT BALL, a (Hill- Zenof the United States, and a resident of tors employed for transmittingpower from a motive device to a reciprocatory member, such as a tool orthe like.

This application is a division of my prior application, Serial No.355,404, filed F ebruary 2, 1907.

My invention will be best understood by reference to the followingdescription taken in. connection with the accompanying illustration ofone specific embodiment thereof, while its scope will be moreparticularly pointed out in the appended claims.

Referring to the drawings: Figure '1 is a vertical sectional view,showing a pulsator and compressor together with a working cylinderembodying one, form of my invention; and Fig. 2 is a plan view partly inhorizontal section on the line 2-2 in Fig. 1, showing the valve employedin connection with the working cylinder to control the application ofpressure to the piston thereof.

Referring to the drawings the embodivment of my invention shown thereinfor illustrativepurposes comprises a pulsator comprising a piston 4which reciprocates relative to and within the cylinder 1 to operate thepiston% in the working cylinder '32, which piston may be connectedthrough its depending piston rod 3 to a reciprocatory tool such as arock drill or the like, or with any other member to which it is desiredto impart motion. My invention is not limited in this respect, beingsusceptible of useful application to many and widely different purposes.

:Inthe operation. of the pulsator, air or other fluid maintained underthe desired "pressure. of the system, is pulsated,.that. is.

moved backward and forward so as to be alternately compressed andrarefied on oppos1te sides of the working piston, thereby servingreciprocatively to move the latter.

The pulsator is provided with the piston 4 having a trunk piston rod 5,power being applied to move the pulsator piston reciprocatlvely in anydesired manner, as by means of an electric or other" motor (not shown)connected to the trunk piston rod by means of the connecting rod 6.

The pulsator is suitably connected to the working cylinder by anydesired means, there being herein represented flexible rubber, orjointed metallic, or other suitable conduit connections 7 and 8,connecting the upper and lower ends of both cylinders re spectively.sent the upper and lower portions ofthe pulsator as connected with thecorresponding portions of the working cylinder, it is apparent that sucharrangement might be reversed if desired. The working cylinder may belocated with any desired proximity to or at any desired distance fromthe pulsator cylinder and the two may have any desired or suitablesupport, the latter not being herein shown inasmuch as the presentinvention broadly contemplates the general application of this apparatusto any suitable purpose.

In order to maintain the pressure of the system at a predeterminedpoint, suitable compressing means are provided, the same hereincomprising a compressor having the cylinder 9 secured above and in axialalinement with the pulsator cylinder 1. lVithin Patented Apr. to,19136.. I

While these connections reprethe compressor cylinder is mounted forrethecompre sq the e yipro uc ng anc d.

effective upper and lower pressure areas for the piston.

Any suitable fluid may be employed in the pulsator, but preferablycompressed air is used, supplied in any desired manner and herein bymeans of a compressor whereby a pressure may be built up and used onboth sides of the pulsator. For that purpose I have herein representedan inlet for the air or other fluid at 13, communicating through a valveopening 14 with the upper end of the compressor cylinder and by means ofa vertical passage '15 with the lower end of said cylinder, said upperinlet passage being controlled by a valve 16 and the passage 15 beingcontrolled by a valve 17, each normally spring-pressed to its seat.Suitably mounted with relation to each valve, or the stem thereof, aresuitable valve holding means, herein represented as cam levers 18 and19, respectively, whereby the valves may be held open when desired. Inthe present type of the invention the lower portion of the compressorcylinder is connected by a vertical passage 20 with the lower portion ofthe pulsator cylinder, such passage being controlled by a valve21,preferably spring-pressed to its seat and provided with suitablemeans, such as the cam lever 22, to hold the same in raised position.Preferably, also, the upper portion of the compressor cylinder isconnected by a passage 23 (shown in dotted lines) with the upper portionof the pulsator cylinder, such passage being preferably controlled by avalve 2 1, herein represented as spring pressed to its seat and having acam lever or other device 25 to hold the valve in open position.

It is apparent that any suitable passages may be provided connectingdesired portions of compressor and pulsator whereby pressure may bebuilt up preferably at both ends of such pulsator. By the describedpassages and valves controlling the same, herein represented, when thebuilding up of the air or other fluid in the pulsator is required, thecam levers are thrown off from all the valve stems and the valves areworked according to the travel of the air into and out of the aircompressor. Preferably a safety valve 26 is provided normallyspringpressed to its seat and having, if desired, a cam lever or otherdevice .27 whereby it may be held open.

When the building up of the pressure is finished or when the pressurefluid begins to issue from the safety valve 26, the operator throws downthe cam lever 18 and raises the cam lever 22.

This stops the building up of the pressure in the pulsator, while airfrom the upper end of the compressor will then work back and forththrough the inlet passage 13 passing the valve 16. In the action of thepulsatorthe bottom stroke of the compressor will work with the bottomstroke of the pulsator, thus transforming the compressor into apulsating means and balancing the area of the trunk piston of thepulsator previously described. By moving the cam lever 25 to lift thedischarge valve 24 from its seat the upper end of the compressorcylinder may be placed in free communication with the upper end of thepulsator cylinder so that the upstroke of the compressor piston alsoassists the upstroke of the pulsator piston. Thus the compressor may beoperated asa single acting or a double acting compressor and whenoperating as a single acting oompressor the non-compressing end thereofmay be rendered entirely ineffective by holding open the inlet valve forthat end and leaving free the discharge valve, or it may be made to actas a pulsator and assist the main pulsator by holding open the discharge valve thereof. When the upper end of the compressor is acting asa pulsator to assist the upper end of the main pulsator the force of thedownward impulse given the working piston greatly exceeds the force ofthe upward impulse and the force of the blow struck by the tool isincreased. Thus it is possible to vary at will the force of the impulsegiven the working tool in either direction.

In order to permit the escape of pressure fluid from the system, each ofthe cam levers for the different valves are brought into operativeengagement with its valve, thus permitting the air or other fluid topass out of the pulsator and out of the compressor.

The connections 7 and 8 from the pulsator 1 are represented as connectedto the working cylinder at 28 and 29, respectively, the upper portion ofthe working cylinder having passages 30 and 31 communicating with theconnection 7 and the upper portion of said cylinder whereby pressure maybe admitted thereto. By means of the passages 30 and 31 not only maypressure be admitted to the working cylinder to give the down or workingstroke to the working piston, but, the opening of the passage 31 intothe cylinder being farther from the upper end thereof than the openingof the passage 33 is from the lower end thereof, a cushioning action ishad which prevents'the piston 2 from striking the top head of theworking cylinder 32 in making its upward stroke. Within the wall of theworking cylinder is a vertically disposed passage 33 communicating atits lower end with the lower portion of the working cylinder and at itsupper portion with the passage 30 when a suitably mounted valve 34: isactuated for the purpose.

While any suitable form of valve or valves may be employed and locatedas desired to control the pressure fluid supplied toqoppoe site sides ofthe working cylinder, I have herein indicated for that purpose arotatably mounted valve having a passage35 adapted to place aconnection, as 7,.from the pulsator in communication with theupperportion of the working cylinder or when suitably actuated, incommunication withv the lower portion thereof, a suitable vent 36 (seedotted lines) being. provided and communicating with an axial vent 37 insaid valve, whereby pressure in the upper portion of said cylinder maybe discharged.

It is frequently desirable to raise the working piston within itscylinder together with its depending or otherwise connected tools, if itbe used for the purpose ofactuating tools. In the present embodiment ofthe invention it is preferably done by raising and holding in elevationthe piston 2 of the Working cylinder by movement of the two-way valve34, mounted at the top thereof. At any time when the pulsator is inoperation, or when enough pressure is in the pulsator, to enable it tolift the working piston 2, the latter may be raised and held elevated byturning the said two-way valve so that the part 35 therein registerswith the parts 30 and 33, the vent passage 37 in said valve then beingbrought into register with the vent passage 36. The piston 2 thereforewill be held elevated until the two'way valve 34 is turned to registerwith the parts 30 and 31, whereupon pressure is admitted to the upperface of said piston. The working piston, therefore, may be elevated bymerely turning the valve and without interrupting the action of thepulsator.

It will be understood that while I have herein shown one particular formof my invention, such form being devised for the specific purposehereinof operating a stone channeling machine, the invention is not limited tothe particular details illustrated, nor to the construction norarrangement of parts herein shown, nor is it limited to the applicationherein made thereof, but extensive changes and deviations may be madefrom the described embodiment and the same may be usefully applied to agreat variety of widely different purposes.

Claims:

1. The combination with a pulsator having a cylinder and a pistontherein, of means to operate the same and a compressor for building uppressure in said pulsator, said compressor having a cylinder providedwith a piston and valved fluid pressure connections for placing oppositesides of said compressor piston in communication with opposite sidesrespectively of the pulsator piston.

2. A pulsator having a piston and operating means therefor, and acompressor having a double-acting piston connected to that of thepulsator, said compressor having valved fluid passages connectingopposite sides of its piston with said pulsator.

3. An apparatus comprising a pulsator having a cylinder and a piston andoperating means therefore, a compressor having a cylinder and a piston,operating means therefor, said compressor having inlet passages atopposite sides of the piston, also discharge passages communicating withsaid pulsator and valve means for said passages.

4. A pulsator having a cylinder and a piston and operating meanstherefor, a compressor having a piston therein, means to operate saidpiston in unison with said pulsator piston, said compressor havingvalved inlet passages supplying fluid pressure to oppositefaces of thecompressor piston and having also valved outlet passages openingcommunication between opposite ends of said compressor and opposite endsof said pulsator respectively.

5. A pulsator having a cylinder and a piston provided with unequaleffective pressure areas on opposite sides thereof and operating meanstherefor, a compressor mounted thereon and having a cylinder and apiston and valve-controlled inlets and valve-controlled outlets, thelatter communicating with opposite sides of said pulsator piston, thepiston in said compressor connected to the pulsator piston, and means tocause said compressor piston to supplement the pulsator piston.

6. An apparatus comprising a pulsator having a cylinder and a pistonland operating means therefor, a compressor cylinder 9 having a piston10 connected to the pulsator piston, valve controlled inlet passages 1dand 15 to said compressor, there being provided valve controlled outletpassages 20 and 23 between said compressor cylinder and said pulsatorcylinder and a safety valve 26 for said pulsator cylinder.

7. The combination with a pulsator having a piston adapted to operate adriven element through reciprocating bodies of air on opposite sides ofits piston, of a compressing device comprising a cylinder and a pistonadapted independently to raise the pressure of the air on opposite sidesof said pulsator piston, means for operating said compressing device andmeans for opening the opposite sides of said compressing device pistonto free communication with the opposite sides of said pulsator piston toprovide for the free interchange of pressure fluid and the equalizationof pressure.

8. The combination-with a pulsator of a double acting compressor workingin unison therewith, and means to utilize one end of said compressor asa pulsator to assist said main pulsator while still utilizing theopposite end as a compressor.

9. The combination with a pulsator of a double-acting compressor,connections from the compressor to deliver pressure fluid to saidpulsator, both ends of said compressor being utilizable as a pulsator toassist said pulsator in creating pulsations of pressure.

10. The combination with a pulsator of a double-acting compressorworking in unison therewith, connections from the compressor to deliverpressure fluid to said puisator, one end of said compressor beingutilizable as a pulsator to assist said main pulsator and means forrendering the other end of said compressor ineffective.

11. The combination with a pulsator of a compressor acting in unisontherewith, connections from the compressor to deliver pressure fluid tosaid pulsator and means for rendering said compressor ineffective as acompressor, but effective as a pulsator.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

ALBERT BALL.

Witnesses:

GEO. W. GILMAN, LEE A. KNIGHTS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, D. G.

